I have a site with 2-3 users about 5 miles away. I am looking for the cheapest way to increase there bandwith to our core site. They currently dialin via a 56k modem to a Citrix 1.8 server. I have a Cisco 3661 Core router with 2 open slots, the others have T1 interface cards in them already at my main site. The T1 is too expensive for just a couple of users. My question is what equipment and how do I connect them to our network using DSL and ISDN?